Abstract: A system and a method for controlling an aircraft engine starter/generator. The system includes an AGB of fixed gear ratio for coupling mechanically to a turbine shaft of the engine to enable the engine to be started, a gearbox having multiple gear ratios mechanically coupled to a gearwheel of the AGB, a starter/generator mechanically coupled to a gearwheel of the gearbox, and a controller to cause the gear ratio of the gearbox to be changed as a function of the mode of operation of the starter/generator.

Abstract: An air discharge system for an aviation turbomachine compressor is disclosed. The discharge system includes at least one discharge valve. Each valve includes a valve body suitable for moving between an open position and a closed position of the discharge valve, a camshaft including a cylindrical rod carrying a cam mounted to bear against the valve body in such a manner that rotating the camshaft causes the valve body to move between its open and closed positions, and a device for keeping the cam bearing permanently against the valve body. The discharge system further includes at least one main electric motor having its rotor suitable for driving the camshaft of each discharge valve in rotation, and an electronic control system for controlling each main electric motor.

Abstract: A system and a method for controlling an aircraft engine starter/generator. The system includes an AGB of fixed gear ratio for coupling mechanically to a turbine shaft of the engine to enable the engine to be started, a gearbox having multiple gear ratios mechanically coupled to a gearwheel of the AGB, a starter/generator mechanically coupled to a gearwheel of the gearbox, and a controller to cause the gear ratio of the gearbox to be changed as a function of the mode of operation of the starter/generator.

Abstract: The invention relates to an air discharge system for an aviation turbomachine compressor, the discharge system including at least one discharge valve (10) each valve comprising a valve body suitable for moving between an open position and a closed position of the discharge valve, a camshaft (22) comprising a cylindrical rod carrying a cam mounted to bear against the valve body in such a manner that rotating the camshaft causes the valve body to move between its open and closed positions, and means for keeping the cam bearing permanently against the valve body. The system further includes at least one main electric motor (30) having its rotor suitable for driving the camshaft of each discharge valve in rotation, and an electronic control system (32) for controlling each main electric motor.